The Hitec HS-485HB Deluxe Standard Servo updates the very popular HS-475HB by adding more torque and greater speed. With its top ball bearing, heavy duty, high impact Karbonite gears and high performance circuitry, the HS-485HB offers lots of torque and features excellent centering and resolution. About this ServoGears: Karbonite4.8v Torque: 4.8kg/cm4.8v Speed: 0.22sec/60deg6.0v Torque: 6kg/cm6.0v Speed: 0.18 sec/60degDimensions: 39.8 x 19.8 x 38mmWeight: 45g Manufacturer: Hitec Model: HS-485HB Deluxe Standard Servo